1004020533721 has 2 divisors, whose sum is σ = 1004020533722. Its totient is φ = 1004020533720.

The previous prime is 1004020533661. The next prime is 1004020533757. The reversal of 1004020533721 is 1273350204001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 828764433225 + 175256100496 = 910365^2 + 418636^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004020533721 - 2¹⁵ = 1004020500953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1004020533721.

It is not a weakly prime, because it can be changed into another prime (1004020533781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502010266860 + 502010266861.

It is an arithmetic number, because the mean of its divisors is an integer number (502010266861).

Almost surely, 2^{1004020533721} is an apocalyptic number.

It is an amenable number.

1004020533721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004020533721 is an equidigital number, since it uses as much as digits as its factorization.

1004020533721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 1004020533721 its reverse (1273350204001), we get a palindrome (2277370737722).

The spelling of 1004020533721 in words is "one trillion, four billion, twenty million, five hundred thirty-three thousand, seven hundred twenty-one".